THIS is the man police want to quiz about the killing of a West Yorkshire police officer.

Detectives hunting the gunman who killed one police officer and injured another in Leeds on Boxing Day today sensationally named the suspect they want to trace.

Police said today they wanted to speak to US-born Nathan Wayne Coleman "as a matter of some urgency".

Traffic officer Pc Ian Broadhurst, 34, a married man from Cookridge, Leeds, was murdered in the attack which began when he spotted a stolen car parked near to a row of shops in the city's Dib Lane.

His partner, father-of-two Pc Neil Roper, 45, is recovering after emergency surgery for wounds he suffered when he was hit twice.

A third officer, Pc James Banks, was also targeted by the gunman but escaped when a bullet hit his radio.

As a manhunt was stepped up for 37-year-old Coleman, Det Supt Chris Gregg warned at a press conference this morning: "The person who shot Mr Broadhurst could still be armed."

Coleman has lived in the UK for about four years and worked around West Yorkshire as a doorman.

Detectives issued a photograph of him taken when he registered as a bouncer.

He is divorced and his wife, from North Yorkshire, still lives in the area.

He told her he came from Florida.

Audio tapes made in the police car to which the gunman was taken before he opened fire revealed he had a north American accent.

Coleman's name emerged after police raided a flat in Leeds close to where the gunman's getaway car was found abandoned.

Coleman lived at the flat but has not been seen since Boxing Day.

Officers are now at the hospital bedside of Pc Roper and hope to speak to him at length today.

Det Supt Gregg, former head of Huddersfield CID who is leading the investigation, said: "He is doing extremely well considering his ordeal.

"We are building up information from Neil Roper.

"We will be speaking to him later to try to fill in the blanks."

The third officer, Pc Banks, who had been called to assist the traffic officers after they had an `uneasy' feeling about the suspect, escaped injury when a bullet ricocheted off his radio and baton harness.

Pc Broadhurst had just achieved his dream job.

It had been his ambition to become a traffic cop, West Yorkshire Chief Constable Colin Cramphorn revealed.

Sheffield-born Pc Broadhurst was married two years ago to Eilisa, from Glasgow, whom he had met on holiday in Tenerife. They had no children.

"Ian joined West Yorkshire Police in 1998 and it was always his ambition to join the Road Traffic department," Mr Cramphorn said.

"In March of this year he attained his ambition and became a member of Killingbeck Road Traffic department.